A node app to retreive images from parse

getParseFiles.js

var Parse = require('parse/node');
var fs = require('fs');
var request = require('request');
var moment = require('moment');

Parse.initialize("<app-id>", "<secret-key>");

/***********************************************
 * The idea is to download all images, 100 at 
 * a time. we'll write a recursive function to
 * do that. the files will be downloaded in the
 * ./images/ directory.
************************************************/

//keep a count of downloaded images
var count = 0;

var download = function(items){
  //if we downloaded all images in the current
  //list of items, we need to fetch more (next 100).
  if(count == items.length){
    //end case - if # of items parse fetched
    //is less than 100 we know we've reached
    //the end of data.
  	if(items.length < 100){
  		return;
  	}
  	//reset the count
  	count = 0;
  	console.log("got all 100");
  	//last processed item
	  var lastItem = items[items.length-1];
	  var newBeforeDate = moment(lastItem.createdAt)
	  //lets get the next 100 starting from the created date
	  //of the last object fetched
	  getItems(newBeforeDate.toDate());
  }else{
  	//if we haven't yet downloaded all images in the
  	//current list of fetched items, download the next one
  	var item = items[count];
  	var filename = item.get("image")._name;
  	var uri = item.get("image")._url;

  	request.head(uri, function(err, res, body){
      if (err){ 
      	console.log(err);
      	console.log(item);
      	return;
      }else {
	      var stream = request(uri);
	      stream.pipe(
	        fs.createWriteStream("images/"+filename)
	          .on('error', function(err){
	            callback(error, filename);
	            stream.read();
	          })
	      ).on('close', function() {
	            //call this function again
	            count++;
	            download(items);
	        });
	    }
	  });
  }
};

function getItems(beforeDate){
	var query = new Parse.Query("Item");
	query.notEqualTo("deleted", true);
	query.descending("createdAt");
	query.lessThan("createdAt", beforeDate);
	query.find({
		success: function(item){
			//we will get 100 at a time
			console.log("fetched more items...")
			download(items);
		}
	});
}

getItems(new Date());